By the Mito Renewal Editorial Team · Last updated 5 July 2026
Autophagy is your body's natural process for breaking down and recycling worn-out or damaged parts of its own cells. Mitophagy is the specific version of that process that targets mitochondria — the cell's energy producers. Both are routine cellular “housekeeping,” and both tend to become less efficient as we age.
The literal meaning of autophagy
Autophagy comes from the Greek for “self-eating.” It describes how your cells identify their own damaged or worn-out components, break them down, and reuse the raw materials. It's less dramatic than it sounds — it's basic maintenance happening constantly in the background of healthy cells.
What is mitophagy specifically?
Mitophagy zeroes in on mitochondria, the structures responsible for producing cellular energy. Damaged mitochondria that aren't cleared out can become less efficient and can accumulate. Mitophagy is the mechanism your body uses to remove them and make room for new, healthier ones. Think of it as quality control for your cellular power plants.
Why is this getting so much attention?
Cellular maintenance processes like autophagy and mitophagy tend to decline with age, and that decline is one of the areas ageing researchers study closely. It's why compounds that have been studied for their role in supporting mitophagy — Urolithin A among them — have attracted interest.
In a 2016 study in Nature Medicine, Urolithin A was shown to induce mitophagy and improve muscle function in animal models. Human safety and biomarker studies followed, including work published in Nature Metabolism (2019). Important caveat: this is an active, early-stage field, and studying a mechanism is not the same as proving a health outcome for any individual.
Can you “switch on” mitophagy?
Not on demand. There's no single lever that flips it. What the research generally points to is supporting the processes involved through everyday habits: regular physical activity, adequate sleep, sensible nutrition, and — for some people — consistent supplementation. Our article on cellular energy and everyday vitality explores how this connects to how you feel day to day.
Where Urolithin A fits
Urolithin A is studied for its role in this exact process. Our Urolithin A 500mg supplement is designed as a consistent daily addition to a routine — not a quick fix. If you're new to the topic, start with our beginner's guide to Urolithin A, and read the underlying studies on our references page.
References
- Ryu D, et al. Nature Medicine. 2016;22:879–888. Link
- Andreux PA, et al. Nature Metabolism. 2019;1:595–603. Link
This article is for general education and is not medical advice. Mito Renewal Complete is a dietary supplement and is not intended to diagnose, treat, cure or prevent any disease. Consult your healthcare practitioner before starting any supplement. See our medical disclaimer.